Improvement in combination padlocks



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4or pin It, and prevent its turning. may be placed, it preferred, in thecase I) instead ofy l site stt-12s GEORGE K. FARRINGTCN, CF ALCATRAZISLAND, CALFORNIA, ASSIGNCR -TO HIMSELF AND FREDERICK AND VICTOR SCHULZ.

Letters Patent No. 99,872,

dated February 15', 1870.

IMPROVEMENT IN CQMBINATION PADLOCKS.

.To all whom 'it 'may concern:

Be it known that I, GEORGE K. FARRINGTUN, of Alcatraz Island, in thecounty of San Francisco, State of California, have invented a'new andImproved Combination vPadlock; and I do hereby declare that the bllowingis a full, clear, and exact description ot' the same, reference beinghad to theacconipanying drawings and to the letters marked thereon.

My invention refers to improvements in combinae tion padlocks, andconsists ot' certain details of construction hereinafter described, andhas for its object the production of a lock that shall be exceedinglydifcult to open byany person except some one knowing the combination ofnumbers used in locking it, and being at the same time simple enough forthose who have the key and know the combination--a strong lock and noteasily blown open with powder.

In the drawingsy Figure l is a front elevation, showing the face of thepadlock.

showing the inside of ,thatfplate Figure 3 is a vertical section throughthe center of lock.

Figure 4,a`vertica1 section through the center of front plate a.

Figure 5 is a front elevation, showing the internal parts of the lockwith the front plate a, 'case b, and rivet-pin c removed. v

Figure 6 is a back view of the change-plate d.

Figure 'i' is an elevation of receiving plate e.

Figure S isV the bolt-wheel j.

Figure 9 is t-he key.

' Figure i0, two views of the bolt g.

Figure 11, a nut or washer, h, for securing the rivetpin c.

Figure 12, the rivet-pm c. t

To enable others skilled in the art or science to Figure `2 is anelevation of the lid or front plate a,

make and use my invention, I will proceed to fully dethe bolt g isplaced.

Next in front of the bolt-wheel f the changep'late d is placed. Thisplate has an opening or passage through which the bolt g may pass, andis provided at its circumference with notches that engage the stop Thisstop or pin k in the bolteplate i:

It is evident thatthechange-plate can be'placed in as many differentpositions as there are notches in its circumference.

Next in front of the changeplate the receiving plate is placed. Thisplate has a recess for receiving the bolt g, when it passes through thechange-plate al. The receiving plate. has one hole near its circumfer-Aence, on a line with the center ot' the recess, taped to secure a screwthat secures it to the top plate Z. The

`top plate Z is provided with a number of holes for this up the spacethat would otherwise be vacant, in order that the lock may not be filledwith powder for the purpose of bursting it open.

In larger locks I make a hinge-joint at the point marked x, fig. 5, andmake the bolt-plate solid -up to that point, so that there may be novacant space in the lock that could be filled with powder.

ln the position of the parts shown in tigs. 1, 3 and 5 theA stop or pin7c is in notch l of thechange-plate, and consequently the center line ofthe passage in that plate comes directly under iig. l on the front platea, but if we should shift the change-plate around so that any othernumber, say number 5, should cngage the pin lr, we would iind thatthecenter line' of the passage would come directly under number 5 on thefront plate a.

Tile Vscrew that connects the top plate l to the receiving plate epasses through the hole opposite N o. l in the top plate Z, andconsequently when No. l ot' thetop plate coincides with No. l of thefront plate a, the recess in the receiving plate will coincide with thepassage in the change-plate No. l, on thehead of the rivet-pin. cindicates the center line of the boltwheel f and the/side that containsthe bolt g, and consequently in the position shown in the drawings, therecess in the bolt-wheel f, the passage iu the changeplatc d, and therecess in the receiving plate c are in juxtaposition.

New, it is plain that while the bolt g remains in the recess ot' thebolt-wheel f the bolt-plate@ islocked in lits position, but iti'sevident ,that if the padlock was.;`

recess of the receiving plate e, and if, with the lock still facedownward, we should cause the top piate l to make part of a revolution,the bolt g would be retained in the receiving plate, and it is alsoevident that wheel will be brought directly below the rivet-pin c,' andin that position will allow the bolt-plate ttorbe slid or moved upward,carrying the bolt-wheel with it, and thus open the passage to the hook,or, in other words, the padlock would be unlocked. No matter at whatfigure the change plate may he set when the bolt was changed to thereceiving plate, the rivet with the boltwheel must always be brought tothis position before the bolt-plate can be raised. 1t is plain that thebolt j may be'retained in either recess by shifting the parts, so thatthe communication from one recess to the other is closed.

It will be seen, by reference to iig. 6, that the edges of the passageinthe change-plate d are beveled oli" on the back side, and thecorresponding corners oi' the bolt g, and treated in the same manner, inorder that iu turning the bolt-wheel f the bolt g may not catch in thechange-plate when the lock is held face down, and thus give notice whenthe recess and passage are opposite each other. A

The hole or opening n is for the purpose of gaining admission when thelock is opened to the screw that eonnectsvthe top plate l to thereceiving plate e, and

also to change-plate d.. The key, fig. 9, is provided with ascrew-driver for turningvthis screw, and also a point for changing theposition of change-plate, that pin k may shut in any notch onchange-wheel required every time it is desired to change thecombination, which may be done everytime it is locked by movingchange-plate with point on key.

A solid turn-staple, having a hole therein for the 'introduction of thehook ot' the lock, and passing through a'hasp fitting the turn-staple,is used in connection with this lock, so that the lockecan be turnedeitherside up on the fastening.

Having thus described my invention,

W'hat I claim and desire to secure by Letters Patent is- 1. Thebolt-plate i, provided with a recess for the bolt-wheel, and operated asdescribed, for the purpose set forth.

2. The'bolt g, bolt-wheel f, the change-plate d, the 'receiving plate e,the top plate I, the rivet-pin c, the lid or front plate a, the fillingIm, andthe case b, combined and arranged substantially as describedand-speciiied.

In testimony whereof I have hereunto set my hard and seal.

GEO. K. FARRINGTON. [L. .s.]

Witnesses:

O. WM. SMITH,

